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The Salton Sea is an accumulation of waste water in the bottom 
of a depression below sea level. Relatively to a real sea, it is a mere 
puddle or "duck pond" in a vast extent of arid desert, which at 
one time was the floor for a large body of brackish water. It is 
not a new thing, but a revival in historic times of what has probably 
occurred frequently in geologic history. 

Salton Sea is in Imperial County, California. This county is 
adjacent to the Mexican border and lies immediately west of the 
Colorado River. A great part of the county is below sea level and 
the Salton Sea consists of the waste or seepage water which has 
found its way to the lowest point in the broad extent of depressed 
desert lands. In former geologic times, the head of the Gulf of 
California extended 200 miles farther north than it does at present, 
so that its waves lapped the base of the Santa Rosa Mountains and 
San Jacinto Peak, physical features that are now far inland. At 
this time the mouth of the Colorado River was in the vicinity of 
Yuma, Arizona, 60 miles in an air line north of where it is now. 
Presumably then as now, the river discharged annually into the 
gulf sufficient silt to cover one square mile to the depth of 53 feet. 
This material represented the erosion of the great canyons and 
plateaus of Arizona. 

This extremely muddy river entered the Gulf at about 140 miles 
below its head. It carried the washings from the mountains and 
plateaus of the north, deposited its load of sediment on reaching salt 
water, and spread this out into a broad alluvial fan, ultimately 
filling that portion of the Gulf, cutting off the head and leaving it 
as a detached body of water. The remaining gulf had about the 
same dimensions and outlines that it has today. Delta growth, 
however, did not cease with this separation; silt continued to be 
brought down by the Colorado and to be deposited in its bed, along 
its banks, and in the still waters at its mouth. By this process a 
stream builds up its immediate channel, until this channel is higher 
than the adjacent land on either side. It is then in an unstable 
condition and will shift to more favorable courses at times when 
extreme floors breach its immediate banks. By this process continu- 
ally repeated, it comes eventually to flow over all parts of its delta, 


building up each part in turn, until the whole stands well above sea 
level. By such a process the Colorado River has built up the famous 
delta lands of the Imperial Valley, and meanwhile has discharged 
alternately into the Salton Sink and into the Gulf of California. 

During those periods when it discharged into the sink, this basin 
was filled to the depths of about 300 feet in the deepest part and 
became an inland sea. During the other periods when it discharged 
southward away from the lake, the supply of water which it con- 
tained quickly dried away and left the old lake bottom as the Colorado 
Desert. Doubtless this process was repeated many times, but there 
exists clear evidence of only the last occupancy. This evidence is in 
the form of a remarkably well-preserved old water-line that rims the 
desert from Indio to Cerro Prieto at a height of 40 feet above sea- 
level. On the rocky points that projected into the lake, this shore 
line is indicated by thick deposits of calcium, carbonate, usually 
spoken of as coral by the desert dwellers because of a fancied re- 
semblance to this mineral. Where alluvial cones and the sandy floor 
of the desert formed the shore line, beaches have been developed, 
and ahhough of soft sand and easily eroded, they are even now well 
preserved, thus testifying to the recency of the action that produced 
them. Over the floor of the desert and along the sandy beaches are 
myriads of shells of brackish water mollisks that lived in this lake. 
So abundant are these tiny fossils in the northern end of the desert 
that it has been called on account of their numbers, Conchilla (Little 
Shell) Valley. 

The botanist, too, finds curious confirmation to our story. All 
about the Salton Sink as far as Indio and the Palm Springs farther 
west are curious isolated groves of palms of peculiar sort, the 
Washingtonia, in fact now commonly planted in Southern California 
cities. But Washingtonia should stand by the sea as the palms of 
Florida do, run down the shores of California Gulf, and so these 
isolated groves are but the remnant of a tropic flora, once rich no 
doubt, that all but perished with the last drying of the old Salton Sea. 

It is not possible to state the exact period at which this lake 
disappeared. The time units of geology are too large and too in- 
definite to translate satisfactorily into years, so that when we say 
the last existence of the lake and its disappearance are the most 
recent of geologic events, we still leave the mind groping for a 
definite human standard of time. It is the crudest of estimates, 
merely a guess, indeed, to state that, reasoning from geologic evi- 
dence alone, it may be a thousand years since the lake vanished, yet 
it puts into a concrete form such a guess as the geologist is able 
to make. When human records are studied, some evidence on this 
point is found, but is almost as uncertain as to time as that furnished 
by physical features. The Indians now living at Toro and Alamo 


Bonita have distinct legends to the effect that in some time past the 
valley was occupied by a large body of water. They record that this 
water contained many fish and that it disappeared gradually, until 
eventually the lake became dry. When questioned as to the date of 
this event, they state that it occurred as long ago as the lives of 
four or five very old men, say three or four centuries ago at the 
most. It is not at all probable that their statements are accurate 
as to time, but by combining them with evidence furnished by physi- 
cal conditions, it is possible to say that the lake may have dis- 
appeared and left the desert as we have known it in historic time, 
600 or 800 years ago. 

The territory now occupied by the Salton Sea was covered with 
immense deposits of salt which created an important industry in the 
Salton Sink. The salt was secured from the surface by plowing 
and then carried away by the carload. 

The desert land south of the Salton Sea has been known for 
years and has had a reputation for extreme aridity. Certain adven- 
turous men, more farsighted than others, saw the possibilities of 
agricultural development, finally formed a company, and succeeded 
in perfecting plans for diverting some of the water of the Colorado 
River. This was done by a cut in the west bank of the river in 
the United States near the international boundary. 

The very boldness of the undertaking, and the novelty of the 
situation, added to the popular interest, which was stimulated by 
advertising, thousands of settlers came in and took up claims under 
the Homestead or Desert Act. The water was appUed to the fields 
and thousands of acres were put under cultivation. 

The rapid development of the country and increasing demand for 
water, and the difficulties of keeping open the original heading due 
to the accumulation of sediment, finally forced the owners of the 
canal to look about for some quicker way of getting the needed 
supply of water to the agricultural lands. 

About the time of the greatest need of water was felt in the valley, 
the California Development Co., which furnished the water, appears 
to have reached its limit as regards funds, and with the pressure 
of the farmers for more water, it became necessary to make a hazard- 
ous move. It was finally determined, much against the advice of 
the engineers, to cut into the bank of the river and lead the water 
down a short quick descent to one of the old delta channels, known 
as the Alamo Channel. This channel is just over the Mexican 

Accordingly, in October, 1904, what is known as heading No. 3, 
this being 40 to 50 feet wide and 6 to 8 feet deep, was cut in the 
mud bank of the river, and a small amount of water was allowed 
to flow down, relieving the needs of the farmers. The California 


Development Co. did not have approved plans or funds available to 
build head works in this opening, and it was assumed that with 
ordinary care and watching, the channel could be kept open just 
sufficient to allow the needed amount of water to pass out from the 
west gate. 

With the next rise of the river, however, the fears of the engineers 
were realized. Following a capricious mood, the river concluded 
to go down the easy channel toward the Alamo and send from day to 
day, an ever-increasing flood, rapidly eroding the channel. This 
continued until in the spring of 1905, the entire river was passing 
by an abrupt turn to the westward, down the Alamo channel, spread- 
ing out over the low ground, and ultimately converging northward 
toward the Salton Sink. 

It swept out across the desert, diverging and converging, forming 
many streams, and in many places covering the nearly level ground 
with a sheet of water which extended as far as the eye could reach. 
All of the soil of this country had been deposited by wind or by 
the river in its previous excursions, and hence consisted of extremely 
soft layers of sandy silt or fine mud. As the water progressed 
toward the Salton Sink, it tended to gather into narrow streams. 
Gaining velocity with increase of slope, these began quickly to es- 
tablish for themselves definite beds by scouring out the soft material. 
At first slight falls or riffles were formed. Later these progressed 
backward, deepening as the water scoured out the channel, which 
had formed in the soft earth. 

Sometimes the water coming from the Colorado River overflowed 
the fields of the farmers and the grain or alfalfa was overtopped by 
the muddy flood. In a . few cases where small towns had been 
built, such as Calexico and Mexicala, the inhabitants gathered to- 
gether and with strenuous exertion, working night and day, at- 
tempted by means of low dikes to hold back the flood and direct 
its course. In the case of Mexicala, the converging torrents formed 
a deep channel and began to progress in their cutting toward the 
town. Attempts were made by means of heavy explosives to change 
the direction of the back-cutting and turn it away from the settled 
country. AH' this, however, was without eflfect and the wide, deep 
channel turned abruptly toward the town, cutting a chasm into 
which toppled in succession houses and bams, the railroad station, 
and a large part of the railroad track. 

The rapid influx of the entire volume of the Colorado River was 
quickly noticeable in the steady rise of the Salton Sea, which, 
swollen by the muddy torrent, gradually engulfed the works of the 
New Liverpool Salt Co. and, creeping up on the ranches near Mecca, 
threatened to submerge the main line of the Southern Pacific Rail- 


In its course from New Orleans to Los Angeles, the Southern 
Pacific System, passing through Arizona, reaches the Colorado 
River at Yuma, which it crosses on a bridge leading north. It 
then swings westward and after climbing a low ridge, descends into 
the depression occupied in part by the Salton Sea. When it reaches 
a point about 250 feet below sea-level, it begins to climb out north- 
westerly through the passes which lead to the valleys in which are 
situated the prosperous towns of Southern California. 

The Salton Sea had only a few feet to rise before it interfered 
seriously with the traffic on the Southern Pacific. The wind, driving 
the waters toward the railroad, imperiled the track and it became 
necessary to rebuild it at a higher level. This was done several 
times in succession and temporary track after temporary track was 
laid down out of immediate reach of the water in the hope that 
the floods would subside. Popular attention was drawn to this in- 
crease in water on the sea, and without seeking the cause, many 
statements were printed to the effect that the ocean had broken 
through a crack or fissur in the earth and was coming up through 
the bottom of the Salton Sea. The Southern Pacific officials, how- 
ever, were all well aware of the cause of the difficulty under which 
they were laboring, and finally finding that the California Develop- 
ment Co. was unable to control the floods, they by an agreement 
dated June 20, 1905, virtually took possession of the company, 
loaning it sufficient money to begin the attempt to close the break. 
They also rebuilt 40 miles of track on the 200-foot contour below 
sea-level, and for possible future use graded another line on the 
150- foot contour below sea-level. 

In all, seven or eight distinct .attempts were made to close the 
break in the river bank with almost as many failures. In each case 
success was nearly attained, but through some inadequate prepara- 
tion or sudden rise of the river, the works were swept away. It 
seemed as though the river was taking a malicious delight in thwart- 
ing the efforts of the engineers. At first, it was assumed that the 
expenditure of a small amount of money would be sufficient to close 
the break. The throwing back of the river into its original channel 
was looked upon as merely an ordinary effort in engineering work. 
When, however, attempt after attempt failed and larger and larger 
expenditures were made until over $1,000,000 was involved, th^ 
Southern Pacific officials began to awake to the fact that they had 
a difficult problem on hand and one which required far better equip- 
ment and preparation than had before been provided. Finally the 
supreme effort was made, and on Nov. 6, 1906, the break was 
closed, and the river forced to assume its normal channel to the 

This condition continued for just a month, when on Dec. 7, 1906, 


the river in a sudden rise, forced its way under the dikes, in a 
few hours swept away a portion of the protecting works, passed 
around the dock dam, and again found its way to the Salton Sea. 
Then came the popular despair. One million dollars had been ex- 
pended and there seemed no way of putting the river back again 
in place without having available an equipment and a sum of money 
beyond the reach of the people most immediately interested. Ap- 
peals were made to the Governor of CaUfornia, and by the Governor 
to the President of the United States. These were given prompt at- 
tention. President Roosevelt took the matter up at once, and hastened 
to investigate, finding that the only man who could handle the situa- 
tion, who had the equipment, the money and facilities, was Mr. E. H. 
Harriman, the President of the Southern Pacific, who at the same 
time controlled the destinies of the California Development Co. 

At first in the pressure of large affairs, Mr. Harriman overlooked 
the fact that he was virtually the controller of the destiny of the 
California Development Co., and through this of the fortunes of a 
large community. He hesitated to advance more money, and wired 
to the President to that effect. Mr. Roosevelt in his telegram of 
Dec. 20, to Mr. Harriman, stated that — 

"This is a matter of such vital importance that there is not the 
slightest excuse for the Development Co. waiting an hour for the 
action of the Government. It is its duty to meet the present danger 
immediately, and then the government will take up with it, as it 
has already taken up with Mexico, the question of providing in 
permanent shape, against the recurrence of the danger." 

Mr. Harriman's reply on the same day stated that — 

"You seem to be under the impression that the California De- 
velopment Co. is a Southern Pacific enterprise. This is erroneous: 
It has nothing to do with the work or the opening of the canal. 
We are not interested in the stock and in no way control it. 
We have loaned it some money to assist its dealing with the situa- 
tion. What the Southern Pacific has done was for the protection 
of settlers as well as of the tracks, but we have determined to move 
the tracks to higher grounds anyway. However, in view of your 
message, I am giving authority to the Southern Pacific offices in the 
west to' proceed at once with efforts to close the break, trusting that 
the Government, as soon as you can secure the necessary Congress- 
sional action, will assist us with the burden." 

The President in reply said — 

"I am delighted to receive your telegram. Have at once directed 
the Reclamation Service to get into touch with you so that as soort 
as Congress assembles, I can recommend legislation which will 
provide against a repetition of this disaster and make provisions for 
an equitable distribution of the burden." 


As a result of these telegrams received in rapid succession, Mr. 
Harriman concluded again to make an effort, and on Jan. 12, 1907, 
the President, in accordance with his promise, laid the whole matter 
before Congress. The final effort was successful, and before the 
time of the spring flood of 1907, the river had once more been 
restored to its proper channel. During the summer, a series of 
dikes were built, intended to prevent any possibility of a recurrence 
of the danger in that part of the river. 

To one who is accustomed to the surroundings of the ordinary 
river, the problem of turning back the Colorado River into its 
former channel may not appear to be very difficult. But to explain 
the reason of the failure in rapid succession, it should be borne in 
mind that the river at this point flows over deposits of silt or sand, 
whose character is such that under a swift current, they are torn 
up and carried away with wonderful rapidity. Whenever the channel, 
in a notable degree was confined, the water at once began hurrow- 
ing and cutting so that in some cases it is claimed that wooden 
piles over 70 feet long were cut out of the river almost as fast 
as they could be driven. 

It was a simple matter to bring the work of closure or diversion 
to a point where it seemed as though the river could be quickly 
turned, but the construction of the channel due to any structure 
resulted in increasing the speed of the water and adding to its 
consequent erosive power to an extent such, that in a few hours, 
enormous gaps were created. 

Added to the unfavorable character of the bed and banks was 
the fact that the river seldom remained quiet for any considerable 
length of time. It was subject to short, violent floods, especially 
from its tributary, the Gila. These, occurring at the time when the 
work was in a critical condition, quickly rendered useless the efforts 
of the constructors. 

The method finally adopted for turning the stream was one whose 
success depended on having at hand a large railroad equipment and 
an enormous amount of material which could be quickly transported. 

The attempt was on a gigantic scale. 

First, a branch railroad was built from the main line at Pilot 
Knob, in California, to the break in Mexico — twelve miles — together 
with numerous side tracks for loaded cars. 

Second, an order was issued by the Southern Pacific Railroad 
to every stone quarry within 350 miles. Thousands of men instantly 
attacked granite mountains with dynamite and steel. 

Third, freight carrying business was stopped on two grand di- 
visions of the road and every car was impressed as a rock carrier. 

Fourth, a vast quantity of material was massed at the break in 
thousands of cars, rock, gravel, sand, clay, piles, ties, steel rails and 



a host of Other things. The plan was to prepare for one gigantic 
attack with all materials at hand. A steamer, a flat-boat, a giant 
dredger, steam shovels, a pile driver, steam pumps, cables, spikes, 
picks and hammers galore were accumulated. Then came 600 Euro- 
peans and Mexicans and 450 Indians — the largest number of the 
latter ever at work in one body. Then came 600 horses and mules, 
with a great number of plows, scrapers, carts, wagons, spades and 
shovels. Then up went electric lights for night work and telephones 
to Yuma and Los Angeles for emergency purposes. Every man 
from the highest engineer to the lowest Indian knew that a terrific 
battle was about to open. Every man of the 1,050 had been trained 
in engineering work before, and each knew what and when to do. 
If they had not been trained for critical and highly dangerous work, 
the Imperial Valley would still be traversed by the Colorado River 
and the Southern Pacific would have again been submerged. The 
entire southwest had been scoured for cars, and there they stood, 
filled with rocks, on the 10th day of August, 1906, with eight 
colossal locomotives to haul the immense loads. 

On that day word was given and the pile driver began driving 
a straight row of piles across the river. Steel cables 54 of an inch 
in diameter were cut at proper lengths and attached to the piles, 
descending down stream. While the piles and cables were being 
placed, hundreds of men were at work on a flat-boat or barge, also 
attached to the cables fastened to the piles up stream. This boat 
was at the exact point where the dam was to begin. The men 
bound tall slender willows into bundles by means of heavy wire. 
These were 100 feet long and 20 inches in diameter. Twelve "dead 
men" — huge logs — were buried deep in the silt bank. One end of 
the cable was attached to each log, and the entire cable was wound 
on 'a great spool on the boat. There were twelve spools, twelve 
cables, eight feet apart. The willow bundles were then fastened by 
double loops to the cables. Thus the cables were the warp and the 
willows the woof of a carpet 100 feet wide and 3000 feet long. 
When everything was ready, a steamer pulled the boat out from 
the shore, the carpet slipped over the edge of the barge into the 
river and sank to the bottom, when silt at once began to fill in be- 
tween the leaves and twigs. 

Then came the carpet-tack men on a huge pile-driver ; they tacked 
down the strip of "carpet" with heavy piles from 40 to 60 feet in 
length in two parallel rows. In the deepest part of the river, three 
widths of carpet were placed, one above the other. Now here is 
the secret of success. Silt brought many difficult problems. The 
bottom is of fine silt of great but unknown depth, anywhere from 
perhaps 2000 to 5000 feet. It is a remarkable substance, for a rock 
dropped into it under rapidly running water would have been under- 


mined and settled lower and lower. Perhaps a dam could have 
been put in by the use of a number of millions of tons of rocks; 
but it was put across with only 70,000 tons — thanks to the wil- 
lows. Then came the railroad builders and laid a heavy railroad 
on the tops of the piles from shore to shore. This roadbed is of 
enormous strength, necessary to hold the trainloads of rocks, and 
braced in every part to withstand pressure of water. 

This dam was called the "Hind Dam," in honor of the field en- 
gineer, Thos. J. Hind. It was a conglomerated mass, 170 feet wide 
at the base, 30 feet across at the top and 35 feet high at the deepest 
places in the break. It was 3000 feet in length, of which 600 feet 
was of rock construction and 2400 feet of earth and gravel. 

The work began on August 10th, 1906, and was completed on 
Nov. 4, 1906, at a cost of $1,500,000. But the homes of 12,000 
settlers and 1,500,000 acres of rich land were saved from inundation. 

For a period of 35 days the river flowed on, when on December 
7th, a break occurred about 2500 feet below the works, and was 
1100 feet wide. 

The engineer corps were again reassembled, E. K. Clark, engineer 
of the Tucson division of the Southern Pacific, placed in direct 
charge, and work was recommended to solve this troublesome prob- 

To build the "Clark Dam," no attempt was made to follow science. 
The Southern Pacific placed their entire road subject to the orders 
of the engineers, and material of almost every kind were rushed to 
the break from points far and near as fast as it could be taken care 
of. Piles were driven, a temporary road was constructed across the 
break, and there was almost a continuous dumping of rocks, gravel 
and dirt into the gap. A carload of material was dumped every 
seven minutes, both day and night, and in the short period of thir- 
teen days, 100,000 tons were disposed of, bringing the dam up to the 
water level. Much of the material was hauled a distance of 380 
miles. The "Clark Dam" was practically completed February 10, 
1907, and the river was declared conquered. The dam proper is 
1200 feet in length, of which 700 feet is of rock and 500 feet of gravel 
and earth. The California Development Co. and the Southern 
Pacific expended on these two dams and other nearby levees, a sum 
in excess of $3,500,000. 

The Colorado River was thus directed onward and no further 
breaks have occurred. Steel and concreate head-gates have been 
built at the entrance to the irrigation canals and no further trouble is 

At its greatest extent the Salton Sea covered about 400 square 
miles, at a maximum depth of about 72 feet. The bottom of the 
Sink in November, 1904, just after the cut was made, stood 273.5 feet 


below mean sea-level. The rise during November and December of 
that year was 0.8 feet. During 1905, it was 21.9 feet. In 1906, the 
water continued to rise and increased in depth by 49.8 feet; but in 
1907, the closing of the break in February was followed by a decline 
beginning in March, the net fall, however, being only 0.18 feet. 
The level on January 1, 1908 was 201.18 feet below mean tide. The 
decline has continued ever since. At present, the Salton Sea is 
about 350 square miles in extent with a maximum depth of about 
60 feet. The evaporation, however, is offset to a great degree by 
the surplus water not used in irrigation from the canals. This water 
flows down the incline till it finds the Salton Sea. However, six 
to eight square miles of land is reclaimed each year from the Salton 
Sea, and this will continue until the area of the lake is so small 
that the overflow from the canals will equal the evaporation.